Patents by Inventor Michael D. Camras
Michael D. Camras has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10312422Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.Type: GrantFiled: February 27, 2017Date of Patent: June 4, 2019Assignee: Lumileds LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach
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Publication number: 20170301838Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.Type: ApplicationFiled: February 27, 2017Publication date: October 19, 2017Inventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach
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Patent number: 9583683Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.Type: GrantFiled: December 20, 2013Date of Patent: February 28, 2017Assignee: Lumileds LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach
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Patent number: 8846423Abstract: A device is provided with at least one light emitting device (LED) die mounted on a submount with an optical element subsequently thermally bonded to the LED die. The LED die is electrically coupled to the submount through contact bumps that have a higher temperature melting point than is used to thermally bond the optical element to the LED die. In one implementation, a single optical element is bonded to a plurality of LED dice that are mounted to the submount and the submount and the optical element have approximately the same coefficients of thermal expansion. Alternatively, a number of optical elements may be used. The optical element or LED die may be covered with a coating of wavelength converting material. In one implementation, the device is tested to determine the wavelengths produced and additional layers of the wavelength converting material are added until the desired wavelengths are produced.Type: GrantFiled: July 8, 2013Date of Patent: September 30, 2014Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, William R. Imler, Franklin J. Wall, Jr., Frank M. Steranka, Michael R. Krames, Helena Ticha, Ladislav Tichy, Robertus G. Alferink
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Publication number: 20140191265Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.Type: ApplicationFiled: December 20, 2013Publication date: July 10, 2014Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.VInventors: MICHAEL D. CAMRAS, MICHAEL R. KRAMES, WAYNE L. SNYDER, FRANK M. STERANKA, ROBERT C. TABER, JOHN J. UEBBING, DOUGLAS W. POCIUS, TROY A. TROTTIER, CHRISTOPHER H. LOWERY, GERD O. MUELLER, REGINA B. MUELLER-MACH
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Patent number: 8748912Abstract: A device is provided with at least one light emitting device (LED) die mounted on a submount with an optical element subsequently thermally bonded to the LED die. The LED die is electrically coupled to the submount through contact bumps that have a higher temperature melting point than is used to thermally bond the optical element to the LED die. In one implementation, a single optical element is bonded to a plurality of LED dice that are mounted to the submount and the submount and the optical element have approximately the same coefficients of thermal expansion. Alternatively, a number of optical elements may be used. The optical element or LED die may be covered with a coating of wavelength converting material. In one implementation, the device is tested to determine the wavelengths produced and additional layers of the wavelength converting material are added until the desired wavelengths are produced.Type: GrantFiled: November 3, 2011Date of Patent: June 10, 2014Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, William R. Imler, Franklin J. Wall, Jr., Frank M. Steranka, Michael R. Krames, Helena Ticha, Ladislav Tichy, Robertus G. Alferink
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Patent number: 8628985Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent lens having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent lens to a light emitting device having a stack of layers including semiconductor layers comprising an active region includes elevating a temperature of the lens and the stack and applying a pressure to press the lens and the stack together. Bonding a high refractive index lens to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. Advantageously, this improvement can be achieved without the use of an encapsulant.Type: GrantFiled: October 4, 2011Date of Patent: January 14, 2014Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach
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Publication number: 20130293145Abstract: A device is provided with at least one light emitting device (LED) die mounted on a submount with an optical element subsequently thermally bonded to the LED die. The LED die is electrically coupled to the submount through contact bumps that have a higher temperature melting point than is used to thermally bond the optical element to the LED die. In one implementation, a single optical element is bonded to a plurality of LED dice that are mounted to the submount and the submount and the optical element have approximately the same coefficients of thermal expansion. Alternatively, a number of optical elements may be used. The optical element or LED die may be covered with a coating of wavelength converting material. In one implementation, the device is tested to determine the wavelengths produced and additional layers of the wavelength converting material are added until the desired wavelengths are produced.Type: ApplicationFiled: July 8, 2013Publication date: November 7, 2013Inventors: Michael D. Camras, William R. Imler, Franklin J. Wall, JR., Frank M. Steranka, Michael R. Krames, Helena Ticha, Ladislav Tichy, Robertus G. Alferink
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Patent number: 8486725Abstract: A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.Type: GrantFiled: June 4, 2012Date of Patent: July 16, 2013Assignee: Philips Lumileds Lighting Company, LLCInventors: Steven Paolini, Michael D. Camras, Oscar A. Chao Pujol, Frank M. Steranka, John E. Epler
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Patent number: 8415694Abstract: A device includes a light emitting structure and a wavelength conversion member comprising a semiconductor. The light emitting structure is bonded to the wavelength conversion member. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with an inorganic bonding material. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with a bonding material having an index of refraction greater than 1.5.Type: GrantFiled: February 23, 2010Date of Patent: April 9, 2013Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Publication number: 20120238041Abstract: A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.Type: ApplicationFiled: June 4, 2012Publication date: September 20, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: STEVEN PAOLINI, MICHAEL D. CAMRAS, OSCAR ARTURO CHAO PUJOL, FRANK M. STERANKA, JOHN E. EPLER
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Patent number: 8202742Abstract: A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.Type: GrantFiled: January 28, 2011Date of Patent: June 19, 2012Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Company, LLCInventors: Steven Paolini, Michael D. Camras, Oscar A. Chao Pujol, Frank M. Steranka, John E. Epler
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Publication number: 20120043564Abstract: A device is provided with at least one light emitting device (LED) die mounted on a submount with an optical element subsequently thermally bonded to the LED die. The LED die is electrically coupled to the submount through contact bumps that have a higher temperature melting point than is used to thermally bond the optical element to the LED die. In one implementation, a single optical element is bonded to a plurality of LED dice that are mounted to the submount and the submount and the optical element have approximately the same coefficients of thermal expansion. Alternatively, a number of optical elements may be used. The optical element or LED die may be covered with a coating of wavelength converting material. In one implementation, the device is tested to determine the wavelengths produced and additional layers of the wavelength converting material are added until the desired wavelengths are produced.Type: ApplicationFiled: November 3, 2011Publication date: February 23, 2012Applicants: PHILIPS LUMILEDS LIGHTING COMPANY, LLC, KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: MICHAEL D. CAMRAS, WILLIAM R. IMLER, FRANKLIN J. WALL, JR., FRANK M. STERANKA, MICHAEL R. KRAMES, HELENA TICHA, LADISLAV TICHY, Robertus G. Alferink
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Publication number: 20120021543Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent lens having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent lens to a light emitting device having a stack of layers including semiconductor layers comprising an active region includes elevating a temperature of the lens and the stack and applying a pressure to press the lens and the stack together. Bonding a high refractive index lens to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. Advantageously, this improvement can be achieved without the use of an encapsulant.Type: ApplicationFiled: October 4, 2011Publication date: January 26, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.VInventors: Michael D. CAMRAS, MICHAEL R. KRAMES, WAYNE L. SNYDER, FRANK M. STERANKA, ROBERT C. TABER, JOHN J. UEBBING, DOUGLAS W. POCIUS, TROY A. TROTTIER, CHRISTOPHER H. LOWERY, GERD O. MUELLER, REGINA B. MUELLER-MACH
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Patent number: 8067254Abstract: A device is provided with an array of a plurality of phosphor converted light emitting devices (LEDs) that produce broad spectrum light. The phosphor converted LEDs may produce light with different correlated color temperature (CCT) and are covered with an optical element that assists in mixing the light from the LEDs to produce a desired correlated color temperature. The optical element may be bonded to the phosphor converted light emitting devices. The optical element may be a dome mounted over the phosphor converted light emitting devices and filled with an encapsulant.Type: GrantFiled: January 12, 2010Date of Patent: November 29, 2011Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, William R. Imler, Franklin J. Wall, Jr., Frank M. Steranka, Michael R. Krames, Helena Ticha, Ladislav Tichy, Robertus G. Alferink
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Patent number: 8049234Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.Type: GrantFiled: October 8, 2007Date of Patent: November 1, 2011Assignee: Philips Lumileds Lighting Company LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler
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Publication number: 20110132521Abstract: A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.Type: ApplicationFiled: January 28, 2011Publication date: June 9, 2011Applicants: PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventors: STEVEN PAOLINI, MICHAEL D. CAMRAS, OSCAR ARTURO CHAO PUJOL, FRANK M. STERANKA, JOHN E. EPLER
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Publication number: 20110062469Abstract: A light emitter includes a light-emitting device (LED) die and an optical element over the LED die. The optical element includes a lens, a window element, and a bond at an interface disposed between the lens and the window element. The window element may be a wavelength converting element or an optically flat plate. The window element may be directly bonded or fused to the lens, or the window element may be bonded by one or more intermediate bonding layers to the lens. The bond between the window element and the lens may have a refractive index similar to that of the window element, the lens, or both.Type: ApplicationFiled: September 17, 2009Publication date: March 17, 2011Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V., PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventors: Michael D. CAMRAS, Nanze Patrick WANG, Hendrik J.B. JAGT, Helena TICHA, Ladislav TICHY
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Patent number: 7902566Abstract: A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.Type: GrantFiled: November 24, 2008Date of Patent: March 8, 2011Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Company, LLCInventors: Steven Paolini, Michael D. Camras, Oscar A. Chao Pujol, Frank M. Steranka, John E. Epler
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Publication number: 20100148151Abstract: A device includes a light emitting structure and a wavelength conversion member comprising a semiconductor. The light emitting structure is bonded to the wavelength conversion member. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with an inorganic bonding material. In some embodiments, the light emitting structure is bonded to the wavelength conversion member with a bonding material having an index of refraction greater than 1.5.Type: ApplicationFiled: February 23, 2010Publication date: June 17, 2010Applicant: PHILIPS LUMILEDS LIGHTING COMPANY, LLCInventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach, Gloria E. Hofler